Zombies Monsters Robots is a free-to-play online third-person shooter from Yingpei Games, previously known as Epic Games China. This game, also known as Hazard Ops in Europe and originally called Mercenary Ops 2, shares many gameplay mechanics with the popular Gears of War franchise and uses the Unreal Engine 3 to offer several addictive game modes, from PvE to PvP.